Sorry guys but I must speak up. Taking photos of someone else's children is never okay. What exactly did your therapist say about this?

However, your standing up for yourself is a good thing and addressing your concerns to the property manager is within your right. If it were me, I would document the frequency and if possible the suites from which these youngsters come.

At 9pm or anytime I would be infuriated as well. Unfortunately most official quiet times aren't observed until after 11:00 pm. Double check this - and find out your community ordinances too. If they are in violation you have within your rights calling the authorities.

Do you feel capable of talking to the parents? Perhaps a suitable plan might be made accommodating the both of you. Maybe there is a best time these kids can do their thing. I wish I had a better answer for you.